1. Department of Obstetrics and Gynecology Tulane University School of Medicine New Orleans Louisiana
2. Department of Obstetrics and Gynecology Women and Infants Hospital/Warren Alpert Medical School of Brown University Providence Rhode Island
3. Division of Infectious Diseases, Department of Medicine UCLA David Geffen School of Medicine Los Angeles California
4. Division of Pediatric Infectious Diseases, Department of Pediatrics UCLA David Geffen School of Medicine Los Angeles California